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mmc: mxs-mmc: add broken-cd property 

According to bindings documentation for mmc, the property 'broken-cd'
can be used to indicate card-detection is not available and polling
must be used instead. This patch retrieves this property
and sets a custom flag. On the get_cd() hook, it returns 1 if
the flag is set, to always assume the card is present.

Signed-off-by: Hector Palacios <hector.palacios@digi.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Hector Palacios 2013-04-10 11:13:45 +02:00 committed by Chris Ball
parent 5086e5f41f
commit 1d53196a0d
1 changed files with 3 additions and 1 deletions
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4
drivers/mmc/host/mxs-mmc.c
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@ -73,6 +73,7 @@ struct mxs_mmc_host {
int wp_gpio;
bool wp_inverted;
bool cd_inverted;
bool broken_cd;
bool non_removable;
};
@ -97,7 +98,7 @@ static int mxs_mmc_get_cd(struct mmc_host *mmc)
struct mxs_mmc_host *host = mmc_priv(mmc);
struct mxs_ssp *ssp = &host->ssp;
return host->non_removable ||
return host->non_removable || host->broken_cd ||
!(readl(ssp->base + HW_SSP_STATUS(ssp)) &
BM_SSP_STATUS_CARD_DETECT) ^ host->cd_inverted;
}
@ -689,6 +690,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
mmc->caps |= MMC_CAP_4_BIT_DATA;
else if (bus_width == 8)
mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA;
host->broken_cd = of_property_read_bool(np, "broken-cd");
host->non_removable = of_property_read_bool(np, "non-removable");
if (host->non_removable)
mmc->caps |= MMC_CAP_NONREMOVABLE;